Now Morgan Freeman is back on the big screen. This time with scientisarlett Johansson in "Lucy." She calls on Morgan's character for help. Take a look. Yes. Professor Norman, my name is Lucy, I read all your research on the human brain much we need to meet. All of my research? Wow, I'm very flattered, young lady, but I find that hard to believe. I read your theory on the use of the brain's capacitiment it's a little rudimentary but you're on the right track. Thank you. And Morgan Freeman joins us now. I love -- I love the look on your face. You're playing a professor who's been studying his whole life on the idea of what would happen if we could use all our brain power and there is a person putting it to the test enand you're just in shock. Stunned to -- right, into speechlessness. This mind is weird. It can go places I think the rest of us don't manage to get to. Well, that's what makes the movie I thought so great and gripping, not only a real thriller but he takes on all these questions about what it means to be a human being, what our brain is capable of. Yeah. And, you know, he sort of grabbed me. I had lunch with him, talking me into doing the movie, didn't take anything. But he was explaining about the connection after the brain power between both lucys, the original -- The original Lucy. Yeah. And the fact that with that much use of your brain, you can make the contact. It's just awesome. We see a little bit of that too. Do you know what you would do if you could use all your brain, every cell? I have no idea. None, none, no idea but if you could use -- well, in her case, you know, being able to use all of it, it's like bye-bye. Yeah, that's what is scary about it. She does so well with that part which is such a strange part. Had you worked with her before. Never. But I will again if she just says, can I get Morgan? Well, you were working all the time. I think you have seven movies in the works. Really? This year, that's what I heard. Seven movies going on. That's news to me, but, okay. You do. You do. But I was wondering, you know, you play god, you play this venerable professor right here. Do you ever miss playing bad guys? Yes. Yes. I think we all at some -- on some level want to resist the idea of being typed, you know. And I had a good run there for a minute and then I became gravitasti gravitastical. Once you become that it's hard to walk off that. Apparently because I have not been able to walk off it. We have a lot of questions coming in on social media. Carol on Facebook wants to know, which of all the movies you've done has left the biggest mark on you personally? The biggest mark. On you which has moved you the most? Moved me the most. Probably -- hmm, it's hard to say. Maybe "Invictus" when I played Mandela. But also when I did "Glory," the story of the 54th Massachusetts regiment, that was -- that moved me. Those ones have to strike so deep. You got a whole other career as a producer. I saw that through the worm hole, a show you've been producing for years, got an Emmy nomination this year, congratulations, finale is tonight and love the premise of this. What would it be like -- would you know it if you were living in the middle of a zombie apocalypse? Well, the way we examine it, we could very well be living in one right now. This is a zombie apocalypse. Well, because we are not quite in control of ourselves. We're actually dependent on that little thing attached to the waist. Oh, the little -- the smartphone. Yeah, yeah. You can ask anybody where's your smartphone and they'll produce it right now. So what happens if you don't have your smartphone? Stuck. Are you completely lost. You're completely lost, right? Good question. Morgan Freeman, thanks a lot for coming in today. George, nice to talk to you.

This transcript has been automatically generated and may not be 100% accurate.

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